In view of this, a variable pitch valve spring is designed to eliminate the axial shifting and radial drifting of the valvedisk and improve the service life of the valve.
鉴于此，笔者试图设计泵阀的变螺距弹簧，以消除阀盘的纵向振谐窜动和径向失稳漂移，提高泵阀工作寿命。
2
Through the redesign and revamp of the valvedisk and body of rotary spindle, the technology is simplified, the cost is reduced and a large amount of foreign exchange is saved for our country.
回转接头的阀芯和阀套经重新设计和改造后，简化了工艺，降低了成本，为国家节省了大量外汇。
3
A type of quick-opening valve whose orifice is opened and closed by a disk that pivots on a shaft in the throat of the valve.